| Direct Audio Buffering
During playback, AudioExplorer creates a set of memory buffers which it fills with audio data and sends to the Windows sound subsystem. By having several filled audio buffers queued for playback, AudioExplorer is free to go about its other work (e.g., analyzing the spectral content of the data being buffered, displaying the spectral content of the audio currently being heard, and filling more audio buffers) without causing "dropout". Note that during playback, AudioExplorer has access to audio data prior to its being heard, so there are no latency issues as there are during recording - i.e., it is safe and more efficient to use a smaller number of larger buffers during playback. Ideally, the total buffering provided to the sound subsystem is equivalent to at least 0.5 seconds of audio activity. As these settings are changed, the dialog will display the total buffering time.
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| Size | Enter the size (in bytes) of each record buffer. |
| # Buffers | Enter the total # of buffers to create. |
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| Transform Options
Outgoing audio data is copied into a circular buffer, and when the circular buffer contains an amount of audio data equal to or greater than the samples per spectrum specified for the Power Spectrum Analyzer, the new chunk of data is sent on to the analyzer, and a portion of the oldest audio data equal to the samples between spectra is permanently removed from the circular buffer. The transform buffer size specifies the total capacity of this circular buffer. AudioExplorer maintains separate Power Spectrum Analyzer (PSA) settings for record and playback modes. The current playback mode PSA settings are listed in this dialog, and can be customized by clicking the Change button and invoking the PSA Options Dialog.
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| Transform Buffer Size | Specify the size of the circular transform buffer. The size must be at least as large as the PSA's samples per spectrum setting. |
| Change... | Press this button to access the Power Spectrum Analyzer settings for recording mode. |
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| Audio Settings
You can select which audio output device to use for playback. Other audio properties (e.g., bit resolution, mono/stereo, sample rate) are determined by the audio file and the capabilities of the playback device.
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| Device | This combo-box lists each of the input audio devices found by the operating system. Select the device to be used for recording. |